Getting Foveation center from OpenXR

May I ask if anyone has tried to get the foveated center from Meta Quest Pro?

I am working on this, and I have tried XR_FB_eye_tracking_social. It seems like this feedback is only the pose.

We would like to try the XR_Meta_eye_tracked, which seems to consist of the processed data. We want to implement it in the ALVR application, however, it seems like returning the default value (0,0). May I ask if there is any method to get the correct value, like enabling some developer option or what?

Thank you